🔧 Little Giant 5-MSP Submersible Utility Pump – 1/6 HP, 1500 GPH, 25-Ft Cord

Compact, continuous-duty submersible pump built for dependable water removal and transfer

📋 Product Overview

The Little Giant 5-MSP (Part No. 505712) is a 1/6 HP Next Generation submersible utility pump manufactured by Little Giant, a division of Franklin Electric. Weighing just 7.4 pounds yet delivering an impressive 1500 gallons per hour at 1 foot of lift, the 5-MSP is a compact powerhouse rated for continuous duty across residential, commercial, and light industrial applications.

This Next Gen model features an oil-free PSC (Permanent Split Capacitor) motor that is environmentally friendly and delivers reliable, quiet performance with thermal overload protection. The rugged epoxy-coated die-cast aluminum housing provides excellent strength and heat dissipation, while the stainless steel motor shaft resists corrosion for extended service life. A removable polypropylene intake screen allows fast cleaning and enables ultra-low pump-down to just 1/8 inch with the screen installed, or an impressive 1/16 inch with the screen removed — significantly reducing cleanup time for water removal tasks.

The 5-MSP includes a generous 25-foot power cord for flexible positioning, a 1-inch FNPT discharge with an included 3/4-inch garden hose adapter, and a built-in carry handle for easy portability. Ideal for draining hot tubs and spas, removing water from basements and crawlspaces, pool cover water removal, hydroponics systems, and general water transfer applications. The 505712 is the Next Gen replacement for the discontinued 505025, 505325, and 505375 models.

⭐ Key Features

✅ 1/6 HP Oil-Free PSC Motor – Environmentally friendly, permanently lubricated motor delivers 1500 GPH with quiet, efficient operation and continuous duty rating

✅ 1500 GPH Maximum Flow – Moves up to 25 GPM at 1 foot of lift with a powerful 26.3-foot maximum shut-off head (11.43 PSI)

✅ 25-Foot Power Cord – Extra-long cord provides maximum flexibility for positioning in basements, crawlspaces, and remote locations

✅ Ultra-Low Pump-Down – Removes water down to 1/8 inch with screen or 1/16 inch without screen, minimizing manual cleanup

✅ Epoxy-Coated Die-Cast Aluminum Housing – Corrosion and rust resistant construction with excellent heat dissipation for both consumer and professional use

✅ Removable Intake Screen – Polypropylene screen protects the nylon impeller and can be quickly removed for cleaning or ultra-low pump-down operation

✅ 1″ FNPT Discharge with Garden Hose Adapter – Versatile discharge accepts 1-inch MNPT fittings; includes 3/4-inch garden hose adapter for standard hose connections

✅ Built-In Carry Handle – Portable, lightweight design at just 7.4 lbs makes the pump easy to transport and deploy

✅ Stainless Steel Motor Shaft – Resists corrosion and wear for extended pump service life

✅ Thermal Overload Protection – Automatic motor protection prevents overheating damage during extended or demanding operation

✅ Continuous Duty Rated – Designed for extended, uninterrupted operation across a wide range of applications

✅ Wet Tested at Factory – Every pump is factory tested submerged before shipping to ensure reliable performance

⚙️ Technical Specifications

Specification	Value
Manufacturer	Little Giant (Franklin Electric)
Model	5-MSP (Next Gen)
Part Number	505712
Replaces	505025, 505325, 505375, 505176
Pump Type	Submersible Utility
Motor Type	Oil-Free PSC (Permanent Split Capacitor)
Horsepower	1/6 HP
Voltage	115V
Frequency	60 Hz
Phase	Single
Amperage	2.0 A
Wattage	220W
Flow Rate (at 1 ft)	1500 GPH (25 GPM)
Flow Rate (at 3 ft)	1464 GPH
Flow Rate (at 5 ft)	1395 GPH
Flow Rate (at 10 ft)	1191 GPH
Flow Rate (at 20 ft)	528 GPH
Shut-Off Head	26.3 ft (11.43 PSI)
Maximum Liquid Temperature	96°F (30°C) continuous duty certified
Discharge Port	1″ FNPT
Garden Hose Adapter	3/4″ GHT (included)
Impeller Material	Nylon
Housing Material	Epoxy-Coated Die-Cast Aluminum
Motor Shaft	Stainless Steel
Screen Material	Polypropylene (removable)
Pump-Down Depth (with screen)	1/8″ (3.2 mm)
Pump-Down Depth (without screen)	1/16″ (1.6 mm)
Cord Length	25 ft
Dimensions (L × W × H)	6.25″ × 4.25″ × 8″
Weight	7.4 lbs
Operation	Manual (no float switch)
Duty Rating	Continuous
Motor Protection	Thermal Overload
Warranty	1 Year Limited

⚡ Electrical Requirements

Electrical Spec	Requirement
Supply Voltage	115V
Frequency	60 Hz
Phase	Single
Running Amperage	2.0 A
Wattage	220W
Cord Length	25 ft
Cord Type	3-prong grounded plug

⚠️ IMPORTANT:

All electrical connections must comply with the National Electrical Code (NEC) and all applicable local codes and regulations.

The pump must be connected to a properly grounded electrical outlet. Do not use an extension cord unless it meets the required wire gauge for the cord length and amperage.

GFCI (Ground Fault Circuit Interrupter) protection is required for all pool, spa, and outdoor water feature installations per NEC requirements.

This pump operates on manual switch only — it does not include a float switch for automatic operation. The pump must be monitored during use to prevent dry running.

📊 Performance Curve Data

Lift Height	Flow Rate (GPH)	Flow Rate (LPH)
1 ft	1,500	5,678
3 ft	1,464	5,542
5 ft	1,395	5,281
10 ft	1,191	4,508
20 ft	528	1,999
26.3 ft (shut-off)	0	0

🔗 Compatibility Guide

This Pump:

📍 Discharge: 1″ FNPT (accepts 1″ MNPT fittings) 📍 Garden Hose Adapter: 3/4″ GHT (included) 📍 Voltage: 115V / 60Hz only 📍 Operation: Submersible use only (not for in-line use)

Connection Options:

The 1-inch FNPT discharge accepts standard 1-inch male NPT fittings, PVC adapters, brass fittings, and flexible discharge hose. The included 3/4-inch garden hose adapter allows direct connection to standard garden hoses for convenient water discharge.

Replaces These Discontinued Models:

Old Part Number	Old Model	Notes
505025	5-MSP	Previous generation, 25 ft cord
505325	5-MSPR-WG	Previous generation with garden hose adapter
505375	5-MSP	Previous generation variant
505176	5-MSP	Previous generation variant

Related 5-Series Models:

Part Number	Model	Cord	Voltage	Switch
505712	5-MSP (this pump)	25 ft	115V	Manual
505723	5-MSP	10 ft	115V	Manual
505721	5-MSP	18 ft	127V	Manual
505714	5-MSP	12 ft	230V	Manual
505715	5-ASP	10 ft	115V	Automatic
505717	5-ASP-LL	18 ft	115V	Automatic

Recommended Accessories:

Part	Description
RS-5LL	Little Giant auto switch for sump pump applications
SA-1	Little Giant sacrificial anode for corrosion protection
Garden Hose Adapter	1″ FPT × 3/4″ MHT (included with pump)

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🛠️ Installation Requirements

Submersible Installation:

Requirement	Specification
Positioning	Fully submerged in liquid
Minimum Water Depth	Pump-down to 1/8″ with screen; 1/16″ without screen
Operation Type	Manual — must be monitored during use
Discharge	1″ FNPT (upward or to side)
Weight Support	Place on solid, level surface at lowest point of water collection

Installation Notes:

⚠️ This pump is designed for submersible use only. Do not operate above water level or use as an in-line pump.

⚠️ Manual operation — this pump does not include a float switch. The pump must be monitored during operation. Do not allow the pump to run dry, as this will cause motor damage.

⚠️ For reduced flow, use the largest diameter hose possible on the discharge to minimize friction losses and maximize pump performance.

⚠️ Remove the intake screen for ultra-low pump-down to 1/16 inch. Ensure the area is free of debris before removing the screen, as debris can damage the impeller.

⚠️ Maximum liquid temperature is 96°F (30°C) for continuous duty operation. For hot tub draining, allow water to cool below this temperature before pumping.

⚠️ Ensure GFCI protection is in place for all outdoor, pool, spa, and water feature installations per NEC requirements.

⚠️ Do not pump flammable, explosive, or corrosive liquids.

🔄 Maintenance Guide

Routine Maintenance:

Task	Frequency	Notes
Clean intake screen	After each use	Remove screen and rinse debris; reinstall before next use
Inspect discharge connection	Before each use	Ensure fittings are tight and leak-free
Inspect power cord	Before each use	Check for damage, cuts, or exposed wiring
Verify GFCI function	Monthly	Test GFCI outlet or breaker per manufacturer instructions
Clean pump exterior	After each use	Remove sediment and mineral deposits from housing
Verify carry handle integrity	Periodically	Ensure handle is secure for safe transport

Warning Signs — Service or Replace Pump If:

• Motor fails to start or runs sluggishly
• Unusual noise (grinding, rattling, or high-pitched whine)
• Reduced flow rate despite clear intake screen
• Motor trips circuit breaker repeatedly
• Excessive vibration during operation
• Power cord or plug shows visible damage
• Pump overheats during normal operation

Screen Removal for Low Pump-Down:

The polypropylene intake screen can be removed to allow the pump to operate down to 1/16 inch of water depth. To remove, twist or unclip the screen from the pump base (refer to the installation manual for model-specific instructions). Ensure the pumping area is free of debris that could enter the impeller before operating without the screen.

Winterization:

If the pump will be stored in freezing conditions, remove from water and drain completely. Store in a dry location above freezing temperatures. Do not allow water to remain inside the pump housing during freezing conditions.

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🎯 Ideal Applications

Application	Suitability	Notes
💧 Hot tub / spa draining	✅ Yes	Allow water to cool below 96°F before pumping
💧 Pool cover water removal	✅ Yes	Excellent for removing standing water from pool covers
💧 Basement / crawlspace water removal	✅ Yes	25-ft cord reaches remote areas; 1/16″ pump-down
💧 Water transfer / recirculation	✅ Yes	Continuous duty rated for extended water transfer
💧 Hydroponics systems	✅ Yes	Reliable, continuous-duty water circulation
💧 Water features / fountains	✅ Yes	1500 GPH provides strong flow for water displays
💧 Window well water removal	✅ Yes	Compact design fits in tight spaces
💧 Fish ponds / garden ponds	✅ Yes	Submersible design ideal for pond water management
♨️ Spa / hot tub jet pump	❌ No	Not designed for jet pump applications
🔄 In-line pump use	❌ No	Submersible use only — not for in-line operation

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❓ Frequently Asked Questions

Q: What is the horsepower of this pump? A: The Little Giant 5-MSP (505712) is rated at 1/6 HP with an oil-free PSC motor operating at 115V/60Hz.

Q: How much water can this pump move? A: At 1 foot of lift, the pump delivers 1500 GPH (25 GPM). At 5 feet, it delivers 1395 GPH. At 10 feet, it delivers 1191 GPH. Maximum shut-off head is 26.3 feet (11.43 PSI).

Q: Can I use this pump to drain my hot tub? A: Yes, but allow the water to cool below 96°F (30°C) first, as this is the manufacturer’s maximum continuous duty liquid temperature rating. The 25-foot cord and 1500 GPH flow rate make it an excellent choice for hot tub draining.

Q: Does this pump have an automatic float switch? A: No. The 5-MSP is a manual operation pump and must be monitored during use. For automatic operation, consider the Little Giant 5-ASP (505715) or 5-ASP-LL (505717), which include float switches.

Q: What size hose can I connect to this pump? A: The discharge is 1″ FNPT, accepting standard 1-inch male pipe thread fittings. A 3/4-inch garden hose adapter is included for connecting to a standard garden hose.

Q: How low can this pump drain water? A: With the screen installed, the pump removes water down to 1/8 inch (3.2 mm). With the screen removed, it can pump down to 1/16 inch (1.6 mm).

Q: What does this pump replace? A: The 505712 (Next Gen 5-MSP with 25-ft cord) replaces discontinued part numbers 505025, 505325, 505375, and 505176.

Q: Can I use this pump in-line (above water)? A: No. The 5-MSP is designed for submersible use only. For a dual-purpose pump that works both submerged and in-line, consider the Little Giant 3E-34N.

Q: Is this pump continuous duty? A: Yes. The 5-MSP is rated for continuous duty operation, making it suitable for extended water removal, recirculation, and transfer applications.

Q: What maximum temperature water can this pump handle? A: The manufacturer certifies continuous duty operation at liquid temperatures up to 96°F (30°C).

Q: Do I need GFCI protection? A: Yes. GFCI protection is required by the National Electrical Code (NEC) for all pool, spa, hot tub, and outdoor water installations.

Q: How heavy is this pump? A: The 5-MSP weighs just 7.4 lbs and includes a built-in carry handle for easy portability.

📥 Downloads & Resources

📄 5 Series Spec Sheet – Complete specifications, performance curves, and dimensions

📄 5 Series Utility Pump Installation Manual – Installation instructions, wiring, troubleshooting, and maintenance

🏆 Why Choose the Little Giant 5-MSP

✅ Proven Brand Heritage – Little Giant (Franklin Electric) has manufactured reliable pumps for over 80 years, trusted by homeowners and professionals alike

✅ Powerful Yet Compact – Delivers 1500 GPH in a lightweight 7.4 lb package with built-in carry handle for true portability

✅ Continuous Duty Rated – Unlike many utility pumps, the 5-MSP is rated for extended, uninterrupted operation

✅ Ultra-Low Pump-Down – Removes water down to 1/16 inch without screen, minimizing manual cleanup effort

✅ Environmentally Friendly – Oil-free motor design eliminates risk of oil contamination in the water being pumped

✅ 25-Foot Power Cord – Extra-long cord reaches basements, crawlspaces, and remote areas without extension cords

✅ Versatile Discharge Options – 1″ FNPT with included garden hose adapter fits both professional plumbing and standard hose setups

✅ Factory Wet Tested – Every pump is tested submerged before shipping for guaranteed out-of-box performance

🤝 Why Buy From Parts4Tubs

✅ Fast shipping across the United States

✅ Expert advice from pool, spa, and water equipment specialists

✅ Competitive pricing

✅ Full warranty support

✅ Hassle-free returns

✅ Replacement screens, adapters, and accessories available

✅ Dedicated customer service team

💧 Summary

The Little Giant 5-MSP (505712) is a 1/6 HP continuous-duty submersible utility pump delivering 1500 GPH at 1 foot of lift with a 26.3-foot maximum shut-off head. Featuring an oil-free PSC motor, epoxy-coated aluminum housing, stainless steel shaft, and removable intake screen for ultra-low 1/16-inch pump-down, this 7.4-pound portable pump includes a 25-foot cord, 1-inch FNPT discharge with garden hose adapter, and built-in carry handle. Perfect for hot tub draining, pool cover removal, basement water removal, and water transfer tasks. Order today from Parts4Tubs for fast US shipping and expert support.